#include<stdio.h>
#include<math.h>
#include"tool.h"


int goldbach(int n){
   int p;
    for(p=3; p<n; p+=2)
        if(prime(p)&&prime(n-p))
            return 1;
    return 0;
}
int main()
{
    int n;
    for(n=6;n<10000000;n+=2)
    {
        if(!goldbach(n))
            puts("Congratulations!");
    }
    return 0;
}
